75 wells across 44 recorded operators, with 0 drilling permits filed in the 24-month window at summary refresh.
Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-06.
Quick answer: The Gammon formation in Montana has 75 wells on record across 44 recorded operators, with 0 drilling permits filed in the 24-month window at source refresh. Its operators with the most wells on record are Armstrong Operating, Ohio Oil Company, Placid Oil Company, Boekel R G and Shell Oil Company. Source: Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-06.
The operators with the most well counts targeting the Gammon formation in Montana:
| # | Operator | Wells in Gammon |
|---|---|---|
| 1 | Armstrong Operating | 8 |
| 2 | Ohio Oil Company | 4 |
| 3 | Placid Oil Company | 4 |
| 4 | Boekel R G | 3 |
| 5 | Shell Oil Company | 3 |
| 6 | Hlm Drilling Company | 3 |
| 7 | Mcdonald Etal | 3 |
| 8 | Bowers Oil & Gas | — |
| 9 | Blackstone Operating | — |
| 10 | Kidd Barron | — |
The Montana counties with the most Gammon activity:
Carter, Fallon
The Gammon is not among the Montana formations tracked separately in the yearly permit mix, so only statewide permit counts are shown.
| Year | State permits | This formation | Share | Median lateral |
|---|---|---|---|---|
| 2026 | 208 | — | — | — |
| 2025 | 54 | — | — | — |
| 2024 | 72 | — | — | — |
| 2023 | 61 | — | — | — |
| 2022 | 65 | — | — | — |
| 2021 | 50 | — | — | — |
| 2020 | 22 | — | — | — |
| 2019 | 75 | — | — | — |
Share of each year’s Montana drilling permits by target formation, for the formations with the most permits.
| Year | Williston Basin | Bakken | Sweetgrass Arch | Powder River Basin | Central Montana Uplift | Heath Fm |
|---|---|---|---|---|---|---|
| 2026 | 95.2% | — | 1.4% | — | — | — |
| 2025 | 85.2% | 7.4% | 7.4% | — | — | — |
| 2024 | 90.3% | — | 5.6% | — | 4.2% | — |
| 2023 | 75.4% | 4.9% | 9.8% | — | 4.9% | — |
| 2022 | 63.1% | 9.2% | 13.8% | — | 9.2% | — |
| 2021 | 42% | 38% | 12% | — | 8% | — |
| 2020 | 54.5% | — | — | — | — | — |
| 2019 | 28% | 16% | 8% | 34.7% | 4% | 5.3% |
Buckhead Energy computes every figure on this page from grouped records in public oil and gas data. The page shows counts, sums, percentiles and indexes only; it does not list individual wells, leases or permits.
Counts under 3 wells and percentiles under 5 wells are withheld; totals are floors.
Share is the formation’s permits as a percent of the state’s permits that year. Median lateral length is published only when at least 5 permits stand behind it.
Last computed: 2026-11-06. These figures are informational only and are not a valuation of any mineral or royalty interest.
The Gammon is a formation/play group recorded in Montana, with 75 wells on file across 44 distinct operators of record. Operators have filed 0 drilling permits targeting the Gammon in the 24-month window at summary refresh. These are stored records, not a live measure of drilling.
Recorded formation activity provides regional context. It does not establish ownership, future production, royalty payments or a value for an individual tract. Consult qualified professionals about your specific interest.
75 wells target the Gammon in Montana, worked by 44 recorded operators, per Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-06.
The Gammon operators with the most wells on record in Montana are Armstrong Operating, Ohio Oil Company, Placid Oil Company, Boekel R G and Shell Oil Company. The full ranking is in the table on this page. Formation summary date: 2026-11-06.
Operators filed 0 drilling permits targeting the Gammon in the 24-month window at source refresh, per Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-06.
Operators filed 0 new drilling permits targeting the Gammon in Montana in the 24-month window at source refresh. New permits and spuds record reported activity stages; they do not establish ongoing drilling, per Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-06.
Gammon activity in Montana includes 75 wells on record and 44 recorded operators, with 0 drilling permits filed in the 24-month window at source refresh — from Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-06.
The primary counties recorded for Gammon in Montana are Carter, Fallon. Formation summary date: 2026-11-06.
Value depends on your net mineral acres or royalty decimal, the operator, the remaining drilling locations, and current oil and gas prices. This page is informational only, not a valuation. Formation summary date: 2026-11-06.
Get a free written offer based on your specific tract, operator, and the current Gammon activity in your area.
Get Your Free Written OfferFormation: Gammon
State: Montana
Total wells: 75
Recorded operators: 44
Permits 24mo: 0
Summary date: 2026-11-06
